Electromagnetic analysis by finite elements of electron guns for traveling wave tubes

Author

Coco, S. ; Corsaro, S. ; Dionisio, R. ; Laudani, A. ; Martorana, R. ; Pollicino, G.

Author_Institution

Dipt. di Ingegneria Elettrica Elettronica e dei Sistemi, Catania Univ., Italy

fYear

2004

fDate

27-29 April 2004

Firstpage

320

Lastpage

321

Abstract

Electron guns are used as electron beam source in a wide variety of devices including traveling wave tubes (TWT), klystrons and particle accelerators. Usage of more complex geometries and insertion of control grid allow the designer to obtain a better performance but it requires specialized 3D numerical simulators to carry out the design process. In this paper we present the COLLGUN simulator, a 3D tool for the design of TWT´s electron gun. The complete simulator consists of three main modules: a dedicated fully 3D Finite Element mesh generator, a 3D FE Vlasov solver, including space-charge effects, with an integrated electron trajectory tracer and a graphic post-processing module for result restitution. Several examples of 3D simulation of electron guns have been analyzed to test the simulator.

Keywords

Vlasov equation; computational electromagnetics; electron guns; mesh generation; space charge; travelling wave tubes; 3D numerical simulators; COLLGUN simulator; GUI; Vlasov solver; cathode geometric shape; cathodic emission; electromagnetic analysis; electron beam source; electron guns; finite elements; graphic post-processing module; integrated electron trajectory tracer; mesh generator; space-charge effects; traveling wave tubes; Analytical models; Electromagnetic analysis; Electron beams; Electron guns; Electron tubes; Finite element methods; Geometry; Klystrons; Linear particle accelerator; Solid modeling;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electronics Conference, 2004. IVEC 2004. Fifth IEEE International

Print_ISBN

0-7803-8261-7

Type

conf

DOI

10.1109/IVELEC.2004.1316340

Filename

1316340